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Article #625479Re: different architecture, was PDP 11/40 system manual
From: John Levine
Date: Wed, 15 Aug 2018 17:58
Date: Wed, 15 Aug 2018 17:58
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3026 bytes
In article <504928995.556023147.9526...@news.eternal-september.org>, Peter Flass <peter...@yahoo.com> wrote: >> More to the point, the /44 only implemented a subset of the 360's >> instruction set, so even with different peripherals it couldn't run >> any other OS. > >I understand there was a later microcode update so it could run OS/360. So the IBM web site says, but I doubt it was very popular. Why get a machine with strange realtime peripherals if you want to run OS? >> Yes. I never entirely understood the difference between BOS and DOS. >> I realize that BOS could run in 8K and DOS needed 16K, but what else >> did BOS leave out? > >I don't know that much about BOS either. I used to think it was a subset of >OS, but Bitsavers has some manuals and it appears it was a subset of DOS. >I'll have to read the manuals. I would assume it at least left out >multiprogramming. I think BOS could be run from cards. I've read the manuals too. The card version of BOS was called BPS, and none of BOS, DOS, or TOS, could do multiprogramming until much later versions of DOS. It looks to me like the disk management was even more primitive than DOS, with sets of disk tracks explicitly assigned to files, and it didn't work with more than 32K which suggests they used direct addressing and 16 bit adcons. -- Regards, John Levine, jo...@iecc.com, Primary Perpetrator of "The Internet for Dummies", Please consider the environment before reading this e-mail. https://jl.ly
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X-Received: by 2002:a6b:a012:: with SMTP id j18-v6mr12135107ioe.39.1534355902315; Wed, 15 Aug 2018 10:58:22 -0700 (PDT) X-BeenThere: alt.folklore.computers@googlegroups.com Received: by 2002:a24:3202:: with SMTP id j2-v6ls489124ita.7.canary-gmail; Wed, 15 Aug 2018 10:58:21 -0700 (PDT) X-Received: by 2002:a24:ac14:: with SMTP id s20-v6mr10555646ite.14.1534355901289; Wed, 15 Aug 2018 10:58:21 -0700 (PDT) MIME-Version: 1.0 Path: mbox-mo1.pugleaf.net!c189-v6ni1059ith.0!nntp.google.com!border1.nntp.dca1.giganews.com!nntp.giganews.com!news.iecc.com!.POSTED.news.iecc.com!not-for-mail From: John Levine <jo...@taugh.com> Newsgroups: alt.folklore.computers Subject: Re: different architecture, was PDP 11/40 system manual Date: Wed, 15 Aug 2018 17:58:21 -0000 (UTC) Organization: Taughannock Networks Message-ID: <pl1pjt$n66$1@gal.iecc.com> References: <21aaeee8-c41a-4442-a4eb-ea6a29b1e4f1@googlegroups.com> <1355830485.555945700.866949.peter_flass-yahoo.com@news.eternal-september.org> <pkut64$lt6$1@gal.iecc.com> <504928995.556023147.952672.peter_flass-yahoo.com@news.eternal-september.org> Injection-Date: Wed, 15 Aug 2018 17:58:21 -0000 (UTC) Injection-Info: gal.iecc.com; posting-host="news.iecc.com:2001:470:1f07:1126:0:676f:7373:6970"; logging-data="23750"; mail-complaints-to="ab...@iecc.com" Cleverness: some X-Newsreader: trn 4.0-test77 (Sep 1, 2010) Originator: jo...@iecc.com (John Levine) Bytes: 2524 Lines: 31 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit